REQT: Direct Client: Senior Full Stack Java Developer @ Austin, TX – Hybrid – Locals only

KSN Technologies. Inc; Austin (TX); Hybrid; USD 120,000 - 160,000; Full time

Job summary

KSN Technologies. Inc is seeking a Senior Full Stack Java Developer for a 9-month contract in Austin, TX. Local candidates only; hybrid onsite arrangement.

Candidates should have 10+ years of experience in Java enterprise development with Spring, Spring Boot, Oracle, and Hibernate/JPA, plus strong front-end skills (Angular/React/HTML5/CSS/JS/TypeScript). The role emphasizes API design, microservices, and DevOps practices (CI/CD, Docker, Kubernetes).

Qualifications

• 10+ years of professional software development with Java and enterprise systems.
• 3+ years in microservices, Docker and container orchestration.
• Designing multi-tier, distributed, highly available apps.
• REST APIs, CI/CD, secure design expertise.
• IAM with OAuth 2.0, SAML, OpenID Connect, JWT.
• Full stack capability across front-end and back-end.
• Java, Spring, Spring Boot, Oracle, Hibernate/JPA proficiency.
• Front-end skills: Angular/React/HTML5/CSS/JS/TypeScript.
• Relational and NoSQL databases experience.
• Agile/Scrum; strong DevOps with Git/Jenkins/Docker/Kubernetes/Maven.
• JUnit, Selenium; Playwright desirable; AI code tools knowledge.

Responsibilities

• Design, develop, and maintain full-stack apps with Java Spring Boot and modern JS.
• Lead scalable, secure, high-performance solutions using Java tech.
• Collaborate with product owners, architects, and teams to deliver end-to-end.
• Design, develop and consume RESTful APIs and integrate with third-party services.
• Build responsive UI components with modern frameworks across devices.
• Contribute to DevOps: CI/CD, Docker/Kubernetes, automated testing.
• Participate in Agile ceremonies and Jira-managed stories.
• Analyze, design, document, implement and test software per user stories.
• Time tracking for billing and reporting purposes.
• Mentor team members and share knowledge.

Skills

Java

Spring

Spring Boot

Oracle

Hibernate/JPA

Angular

React

HTML5

CSS3

JavaScript

TypeScript

REST APIs

CI/CD

Docker

Kubernetes/OpenShift

JWT/OAuth/SAML

Maven

Git/Jenkins

JVM tuning

Multithreading/Concurrency

Agile/Scrum

RESTful integration

Tools

Docker

OpenShift

Kubernetes

Maven

Git

Job description

Senior Full Stack Java Developer

Austin, TX Hybrid Only Locals

9 months contract + Extension

Local candidates ONLY. Candidates must be located within 2 hours of Dimondale, MI at time of submission.

Top Skills & Years of Experience:

- 10+ years of professional experience in software/application development, with strong expertise in Java and developing enterprise-level systems.

- Strong proficiency in Java, Spring, Spring Boot, Oracle, and Hibernate/JPA.

- Strong front-end development skills using Angular, React, HTML5, CSS3, JavaScript, and TypeScript.

- Experience with message queuing systems, such as IBM MQ or equivalent technologies.

- Expert-level proficiency in Core Java, Multithreading, Collections, Concurrency, and JVM performance tuning.

Required skills:

• 10+ years of professional experience in software/application development, with strong expertise in Java and developing enterprise-level systems.
• 3+ years of hands on experience in microservices architecture, containerization (e.g., Docker), and container orchestration (e.g., OpenShift or Kubernetes).
• Strong experience in designing multi tier applications, distributed systems, and high availability solutions.
• Strong understanding of REST APIs, service integration patterns, CI/CD pipelines, and secure application design.
• Proven expertise in modern security protocols and authentication frameworks, including OAuth 2.0, SAML, OpenID Connect, and JSON Web Tokens (JWT), with hands on experience implementing secure and scalable identity and access management solutions across distributed systems.

• Proven expertise in full stack development, with hands-on experience spanning both front-end and back-end technologies.

• Strong proficiency in Java, Spring, Spring Boot, Oracle, and Hibernate/JPA.

• Strong front-end development skills using Angular, React, HTML5, CSS3, JavaScript, and TypeScript.

• Extensive experience working with relational and NoSQL databases
• Experience with message queuing systems, such as IBM MQ or equivalent technologies.

• Familiarity with Agile/Scrum methodologies and the ability to thrive in a fast-paced, iterative development environment.

• Strong background in DevOps practices and tools, including Git, Jenkins, Docker, Kubernetes, Maven
• Expert-level proficiency in Core Java, Multithreading, Collections, Concurrency, and JVM performance tuning.

• Knowledge of Test-Driven Development (TDD) and hands-on experience with automated testing frameworks such as JUnit and Selenium. Experience using Playwright testing platform is desirable.
• Knowledge of AI driven code development tools (Amazon Q & Kiro)

• Excellent problem-solving, debugging, and analytical skills, with the ability to troubleshoot and resolve complex technical issues efficiently.

• Strong communication and collaboration skills, with the ability to work effectively in cross-functional teams.

Responsibilities:

• Design, develop, and maintain full stack applications utilizing Java (Spring Boot) on the back end and modern JavaScript frameworks such as React, Angular, or Vue on the front end.
• Lead the development of scalable, secure, and high-performance solutions using Java-based technologies.

• Collaborate closely with product owners, architects, and cross-functional teams to deliver comprehensive full-stack solutions aligned with business goals.

• Design, develop, and consume RESTful APIs, and integrate with various third-party services and platforms.

• Build responsive, user-friendly UI components using modern front-end frameworks, ensuring a seamless user experience across devices.

• Actively contribute to DevOps practices, including continuous integration/continuous deployment (CI/CD), containerization using Docker/Kubernetes, and automated testing.

• Participate in Agile/Scrum ceremonies and collaborate effectively within an agile development environment.

• Analyze, design, document, implement, and test software solutions based on detailed user stories managed through Jira.

• Ensure accurate and timely time tracking for billing and reporting purposes.

• Work alongside product owners to understand and define complex business processes and translate them into effective technical solutions.

• Identify common issues and recurring patterns across applications to design reusable, scalable solutions that reduce redundancy and improve maintainability.

• Provide knowledge transfer and mentorship to team members, ensuring continuity and shared understanding of developed solutions.

Detailed skills required:

• Proven ability to communicate effectively with both technical teams (developers, testers, architects) and business stakeholders (product owners, project managers, executives), ensuring alignment between business requirements and technical capabilities.

• Extensive experience working in Agile and Hybrid environments (Scrum, Kanban), with a strong track record of translating business requirements into actionable user stories for development teams; also familiar with traditional SDLC methodologies such as Waterfall.

• Strong understanding of enterprise software integration, including how applications interface with other systems and databases to support scalable and cohesive business solutions.

• Knowledgeable in IT infrastructure and architecture, APIs, middleware, and the evaluation of legacy versus emerging technologies in the context of software development decisions.

• Skilled at identifying functional and technical gaps in existing systems and designing targeted solutions whether through the development of new features, integration of third-party applications, or enhancement of legacy platforms to effectively meet business needs.